He said when Crown witnesses could not recall certain events posed to them by Mr Krebs it was a simple case of "those events not occurring".
Mr Thornton added Dunnett held a position of responsibility and at times it was "totally unbelievable" the events occurred in the way Dunnett had claimed in his evidence.
Mr Krebs said in his closing submissions, often the complainants were "voluntarily participating" or consenting in the alleged incidents with his client, as was the case at the surf club's toga party.
"This was not a Sunday school picnic but a toga party after all, as I put to a witness."
He added that several of the Crown witnesses gave "unreliable evidence" because they had no recollection of certain events.
In many of the episodes Dunnett had acted in "honest belief" but he said it was a "fair concession his moral compass was broken".
"However, your Honour these courts are courts of law and not courts of morals," he told Judge Atkins.
In one count of indecent assault, Dunnett was not the perpetrator but simply a "face [the complainant] recalled from the party" when she identified him in police photographs.
Judge Atkins remanded Dunnett on bail until May 30, when he is due to deliver his verdict.
